Another First Chance, by Robbie Couch

The billboard mocks River.  Everyday, he has to drive by the picture of his late best friend Dylan, adorning a PSA urging teens not to text and drive.  River hates that his dead friend has been reduced to a safety lesson and will only be remembered for his fatal error.  River was so much more than that to Dylan.  So, one day he vandalizes the billboard.

Meanwhile, a company called Affinity has come to town promoting a new study they are doing into how relationships are formed.  They are soliciting River and his classmates to be participants.  And for some reasons, his friends and even the guidance counselor is pressuring him to sign up.  Initially, he has no interest but one of his classmates with knowledge of River's recent vandalism blackmails River into joining the study.

The study involves locking away twenty student in isolation for a week and conducting group therapy and meditation practices, which all seems pretty harmless.  But strange things start happening. People  experience particularly vivid dreams, River is accused of doing things he can't recall, and River himself meets a stranger who reminds him so very much of his dead friend Dylan.

A story dealing with loss and moving on, placed in a rather thin thriller about mind experiments.  Cue the gaslights.  At first, this seemed like a useful vehicle for getting River and his friends together to address their relationship with the late Dylan.  But as the story unfolds and the experiment itself grows more and more outlandish, I found it distracting to the far more interesting emotional growth that River was going through.  I think the story would have benefitted by being more rooted in reality.  As it was, the silly parts detracted from the story.